It has been known for a while that medical professionals and trainees (including students) show symptoms of depression and anxiety disorders at a rate significantly greater than in the larger population. Furthermore, suicide is extremely common in the medical profession. It's a very important topic, thanks for the review and article link.
Physician suicide:
http://www.theatlantic.com/health/archive/2014/09/suicide-and-the-young-physician/380253/
paper from BMJ in 1967 on Psych illness in medical prof. - so it's not just the US and it's not just a consequence of modernity as your article seems to suggest (or maybe it is, these issues are complicated and maybe these two situations do not commute):
http://bjp.rcpsych.org.ezproxy.lib.utexas.edu/content/bjprcpsych/113/502/1013.full.pdf
excerpts from paper:
"We found that 32.8 per cent. of the doctors in this sample were addicted to alcohol or other drugs."
"The high incidence of suicide, especially amongst doctors under the age of 50, has been
stressed by other writers, as already noted. We believe that many of these suicides occur because doctors are reluctant either to seek or to act upon psychiatric advice, for the reasons already outlined. Unlike Blachly, Osterund and Josslin,we did not find a higher incidence of suicide amongst our addicts. Overdosage of dangerous drugs was the method almost exclusively employed."
one argument I find particularly convincing that is unique to the profession:
"Many suggestions have been made to account for the high suicide rate in the medical profession; amongst them, the availability of poisonous drugs and the doctor's toxicological knowledge,
a lack of spiritual concept of life (Lucca: maybe this is more of a British thing?) or lack of dread of death, the high pressure of work and its anxiety-provoking nature, the increasing complexity of medicine, diminishing public image, and failing self-respect (Blachly, Osterund and Josslin, 1963 ; Anon., Brit. med. J., 1964; Stengel, 1964). It has also been suggested that many of the personality traits which characterize a good doctor may predispose to depression (Blachly, Osterund and Josslin, 1963). Whilst we accept that factors of this kind may be important in the aetiology of psychiatric illness in the profession, we believe that ultimate recourse to
suicide could often be avoided if doctors were less reluctant to seek help from their psychiatrically trained colleagues."