Thanks for the tips on handling feedback. On the new logos - we don't like the runners - they are too cartoony. I like the bolder font, but can we try something less 1980s? Don't know if gray works as third color. Overall, I think we are on a good track - nice bold figures and text, simple and compact logo.
nzr, on #7, use the swoosh from #5 as the top part of the sthethoscope, then add the bottom half (the flexible tube) from #7. Also, have the text sit on top of the flexible tube in some way.
#50 is very very good. Thanks for your efforts. we like the logo but not quite the font use - too modern and digital. we like it a little more traditional.