https://www.profitableratecpm.com/f4ffsdxe?key=39b1ebce72f3758345b2155c98e6709c
(MedPage Today) — Mark Harper, MD, PhD, recalls his first cold-water swim in the south of England 20 years ago. It was August, but the initial jolt from the plunge took his breath away.
The shock to his system lasted a minute or two until he…
