Daly's process must go through months of toxicology testing before pilot programs even begin.

FORBES: Magazine Article

So, following the office's policy, Khan's body underwent what Cina described as an "external examination (and) basic toxicology testing, " neither of which turned up anything abnormal.

CNN: STORY HIGHLIGHTS

Professor John Henry, a consultant in toxicology at St Mary's said the testing could be done anonymously for the purposes of research, and would not prejudice the treatment of any patient.

BBC: Call for hospital drug testing