1. A national survey of physician–industry relationships;Campbell;N Engl J Med,2007
2. Pharmaceutical Research and Manufacturers of America. Code on interactions with health care professionals. Available at: https://www.phrma.org/-/media/Project/PhRMA/PhRMA-Org/PhRMA-Org/PDF/A-C/Code-of-Interaction_FINAL21.pdf. Accessed December 5, 2020.
3. Drug samples in dermatology: out of the closet, into the dustbin;Katz;JAMA Dermatol,2014
4. US Food and Drug Administration. Is it a cosmetic, a drug, or both? (Or is it soap?). Available at: https://www.fda.gov/cosmetics/cosmetics-laws-regulations/it-cosmetic-drug-or-both-or-it-soap#Cosmeceutical. Accessed December 5, 2020.
5. Ni J, Benedict N. Pros and cons of physician dispensing. Available at: https://medcitynews.com/2019/11/pros-and-cons-of-physician-dispensing/. Accessed December 5, 2020.