‘Regrettable’ was the word NIH used on Guatemalan…

“The heads of the CDC and NIH called the recently revealed STD experiments on Guatemalan prisoners during the 1940s by U.S. Public Health Service researchers “regrettable and deeply saddening.”

http://blogs.wsj.com/health/2010/10/11/nih-and-cdc-heads-guatemala-syphilis-study-regrettable-and-deeply-saddening/