1. Clinical registries: should physicians accept payments for enrolling patients?;Jariwala;J Am Acad Dermatol,2017
2. Paying clinicians to join clinical trials: a review of guidelines and interview study of trailists;Raftery;Trials,2009
3. Gliklich RE, Dreyer NA, Leavy MB, eds. Registries for evaluating patient outcomes: a user's guide [Internet]. 3rd ed.. Rockville (MD): Agency for Healthcare Research and Quality (US); Apr 10, 2014. Recruiting and retaining participants in the registry. Available from: https://www.ncbi.nlm.nih.gov/books/NBK208617/. Accessed February 3, 2017.