scared driver delight:
I misread wisey’s post. I thought he was talking about kohanim so I pointed out that R’ Hirschenson used that sevara as part of a heter for kohanim to go to medical school:
http://hebrewbooks.org/pdfpager.aspx?req=1544&st=&pgnum=194&hilite=
Since I thought we were discussing kohanim, I noted that R’ Moshe was vehemently opposed to kohanim going to medical school. In that teshuva he says that pikuach nefesh is not a sevara. So I then quoted R’ Uziel who seems to disagree on that point.