 Complete the following phrase:  In 1990, Kewleys only book entitled Tibet: Behind the Ice Curtain was published. She returned to Tibet in 1991 by smuggling herself into the country across the Himalayas hidden beneath the floorboards of a van to create the follow-up to Tibet: A Case to Answer, entitled Voices from Tibet shown on Channel 4. Kewley revealed martial law was still present in Tibet despite claims from China that it had been ended. She stopped producing documentaries when she was diagnosed with Parkinsons disease in 1993. However Kewley returned to Charing Cross Hospital in the early 1990s to undertake a refresher course before travelling to perform work for the Red Cross in Bosnia and the United Nations High Commissioner for Refugees during the 