Changes

[[File:Friends Karyotyping.jpg|450px|thumb|left|''"How many more do we need?"'']] The '''number needed to karaoke''' (or '''NNK''') is the average number of patients who need to karaoke to prevent one additional bad outcome. The '''NNK''' assumes that one of the songs that will be sung is Bon Jovi's "Livin' on a Prayer." Otherwise, the NNK is invalid and, importantly, just not [[Laughter is the Best Medicine|fun]].