in the u.s., the first federal regulations for human subjects research began in 1991 with the codification of the ________. February 18, 2026 • 1 min read TwitterFacebookWhatsAppLinkedInTelegramCopy Link The blank is: Common Rule. Written by Karthigeyan "Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours." — This philosophy guides my writing and exploration of ideas.