title: The value of observational cohort studies for cancer drugs.
abstract: Randomized controlled trials - the gold standard for clinical drug evaluation -can't always predict adverse events in real-world settings. For the new cancer therapies, observational cohort studies (OCSs) can help evaluate their effects in broader populations and provide valuable information for future clinical trials.
authors.forename: David R
authors.initials: DR
authors.lastname: Spigel