Image copyright Getty Images Image caption Spanish group Avite sued Gruenenthal in 2013 and political parties have finally backed their push for compensation

For decades, Spain's Thalidomide survivors have been the forgotten victims of a drug that caused deformities in some 20,000 babies worldwide after their mothers took it during pregnancy.

Once the drug's disastrous side-effects were revealed, German pharmaceutical company Gruenenthal withdrew it from the market in most countries in late 1961.

Survivors in countries such as the UK were recognised and paid compensation. But in Spain hundreds of people who believe their disabilities were caused by the drug remain unrecognised and do not get the special assistance they need to live normal lives.

Many were born long after the truth about Thalidomide had been established.

Analia Munoz was born more than 20 years afterwards, in 1983, with short arms and legs, no ankles or hip joints and a cleft palate.

Image caption Analia Munoz's mother (L) cannot prove she took Thalidomide

Ms Munoz lives at home near Granada with her parents, both in their mid-sixties. Ana Maria, her mother, remembers going to hospital while pregnant and being given medication. But she cannot prove she took Thalidomide.

"My husband and I both have to carry Analia up and down the stairs and help her in the bathroom. We have no real life outside the home."

Nor does Analia. "I would like to work. I have studied to be a secretary and I once had an interview, but the office wasn't practical for my needs. I am frightened about how I am going to get along when my parents aren't around and I am alone."

Why was Spain so slow to help?

Six decades after Thalidomide was launched in 1956, Spain's political parties have now united in support of proposed new legislation intended to provide the basis of proper assistance and compensation for Spanish survivors.

By 2010, the government had recognised just 24 victims, all born in the early 1960s, offering them one-off compensation payments of up to €100,000 (£84,000; $104,000).

Rafael Basterrechea, born in 1965, was one of the 24. As vice-president of Avite, the association that represents Spain's Thalidomide survivors, he is scathing about the inaction of successive governments and Gruenenthal's refusal to accept responsibility.

"They are waiting for us to die. Gruenenthal makes millions selling its drugs in this country; if the Spanish government put just a little pressure on them, we would get a deal tomorrow," he says.

Sceptical that the government is prepared to help, he calls it a national disgrace that it has taken so long to help an estimated 400 people in a country of 46 million.

"Thalidomide was on the state register of official drugs until 1975. It was not made illegal to prescribe until 1985, when a law was passed meaning the doctor had to sign that he accepted responsibility for the effects. Only then, after 1985, do the cases disappear," says Mr Basterrechea.

History of a disaster drug

Image copyright Claus Knapp Image caption Thalidomide was marketed under different names and sold over the counter

1956: Chemie Gruenenthal's drug Thalidomide is licensed in Germany as an anticonvulsant and anti-anxiety drug

Also considered to reduce "morning sickness" in pregnant women it is sold over the counter in much of Europe

1961: Gruenenthal is presented with studies suggesting the drug's dangerous side-effects on unborn babies

November 1961: Thalidomide withdrawn from sale

1973: UK distributor Distillers recognises and compensates 460 Thalidomide survivors

Gruenenthal helps victims in 38 countries through two foundations it has set up, in recognition of its role in the health disaster.

Forgotten victims fight back

Avite was founded in 2004 by Jose Riquelme, who believes he only found out about his condition aged 17, when he came across a magazine in a rubbish dump near his home in Murcia in 1980 and read an article about Thalidomide survivors abroad.

His campaign group, which now has 286 members, successfully sued Gruenenthal in 2013, when a Spanish judge agreed that the company had not taken the necessary care to ensure that Thalidomide was safe.

The judge in that case ordered Gruenenthal to compensate 20 Spanish survivors out of the 186 named in Avite's lawsuit. But Gruenenthal won on appeal, arguing that after 50 years there could be no proof that these individuals' deformities were related to their drug.

Image copyright Avite Image caption A 1961 letter purportedly from Gruenenthal suggested it was unnecessary to warn Spanish doctors

"No other substance can produce the malformations presented by 250 Spanish victims," according to Xavier Garcia Mora of the Catalan Association of Forensic Medics, who made a detailed study of Avite's members.

Dr Garcia Mora says 90% of those who suffered from the drug's side-effects would have died during childhood.

Drug company's role in Spain

Avite's campaigners have produced what appears to be a letter from Gruenenthal to its sister company in Madrid, dated 21 December 1961 - shortly after Thalidomide was withdrawn from European markets.

In the letter the German company accepts that it is not necessary to warn all Spanish doctors of the drug's danger due to "the extremely minor distribution" of Softenon, the commercial name used in Spain.

"Spain was like a Third-World country up to the 1980s," says Rafael Basterrechea. "Doctors were prescribing to illiterate people a lot of the time and pharmaceutical companies could do whatever they liked."

In a written response to the BBC, Gruenenthal says it "sincerely regrets the Thalidomide tragedy", but argues that distribution of Softenon in Spain ceased under company instructions in November 1961.

"However, in Spain, Thalidomide-containing medicines were also marketed by other companies which had (illegally) manufactured and marketed their own products independently [meaning] Gruenenthal therefore had no control over their operations."

Sofia Maria's story

Sofia Maria Garcia Duran, 46, spends the week at a care home in Sant Feliu de Llobregat, near Barcelona, and weekends with her mother Antonia and her husband.

Image caption Sofia Maria Garcia Duran says almost all the money she receives goes to the care home

She has never received any compensation for her condition, despite being born with no legs and tiny, fingerless stumps for arms.

"I could live alone if I could afford a flat in a decent condition to live in," says Ms Garcia Duran. "But all I get is €550 a month, and the care home costs €450."

Her mother was given unknown medication when suffering severe nausea during pregnancy in 1970.

Doctors who found out

It was in Hamburg that Claus Knapp, 88, and senior partner Widukind Lenz uncovered the cause of so many deformities in babies.

"I was working as a radiologist, sitting there looking at plates all day. Then one day I saw the X-ray of a child with no bottom half: no hips, no legs, nothing.

"I set it to one side, as I had no idea what this was or what could cause this. Then a few more appeared. Every day I gave a demonstration to student doctors and hung up X-ray plates.

Image copyright Clauss Knapp Image caption Dr Knapp was working as a radiologist when he came across the malformations in babies

"People said: 'Why are you always showing us this same case? We don't know what this is.' And I said: 'But it is not the same one - there are many'."

For three weeks in autumn 1961, the two partners drove around Hamburg visiting parents, many of them mourning a Thalidomide baby who had died, trying to find an explanation.

The common denominator was Thalidomide, taken by all of the mothers they had checked, from factory workers who helped themselves to freely available pills to help them get though their shifts, to others taken to hospital during their pregnancies for appendicitis or other ailments.

Image copyright Claus Knapp Image caption Claus Knapp worked for several years as a paediatrician in Hamburg

Dr Knapp moved back to his native Spain in 1963, and believed for many years that the country had been spared the scourge of Thalidomide, until he found out about Avite's campaign for justice.

Widukind Lenz has since died and Dr Knapp, shocked that the fight is still going on after 55 years, says "I'm the last witness".