Deciding whether to recommend Avastin or Lucentis raises ethical issues. Should the public health consequences of using a far more expensive drug trump what the doctor thinks is best for the individual patient?
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.