double-blind study
dubbelblinde studie
uphononongo olufihlwe macala
lucwaningo lolufihlwe nhlangotsi totimbili
irhubhululo elifihlelwe iinqhema zombili
nyakišišophihlegopedi
ngudotshipofu ya vhadzheneli na vhaṱoḓisisi
ndzavisiso tumbelelamitlawa hamimbirhi