Good ethics and good business don’t have to be in conflict. Ophthalmologists shouldn’t resort to requiring their patients to buy contact lenses in-house; instead, they should focus on expanding their skill set and providing personalized service.
Specific contributions to a scientific article entitle the contributor to be included as an author; requests for authorship by those who have not made those specific contributions are unethical.
The bias for publishing positive clinical-research results can cause physicians to question journal articles as dependable sources of product information.