US
80-year-old virologist had been serving life term in prison since January last year.
80-year-old microbiologist also thanks President Zardari for his efforts.
Indian chief justice appeals to Zardari to release Sarabjit Singh.
Indian SC agrees to hear plea on Pakistani serving rest of his bail in Karachi.
Pakistani Dr Chishti was jailed in an Indian prison in Ajmer and had been sentenced to life imprisonment.
Pakistani virologist Dr Khalil Chishti filed petition against Rajasthan High Court's order of upholding his sentence.
Family and lawyers of Dr Chisthi have the right to appeal in the Supreme Court.
Dr Chishti was booked in a murder case in India in 1992.
Daughter calls upon the media to highlight the issue.
Dr Chishty's family is in Ajmer to visit him.