Why it is hard to trust trials sponsored by drug companies
Scepticism about industry-sponsored drug trials will change only if there is unconditional access to trial protocols, argue a team of independent researchers.
Many drug companies are withholding information on trial protocols, they write in the Journal of the Royal Society of Medicine.
Half of the commercially sponsored trial protocols in their study contained redactions, and they say it took three years to receive all 78 protocols requested, despite approved access from local ethics committees.
Companies that withheld information