Randomization
After baseline measurements were completed, the participants were stratified according to sex and randomly allocated to either the intervention (laughter yoga program and standard therapy) or control (standard therapy only) group in a 1:1 ratio according to a computer-generated sequence. All randomization was carried out by a researcher who was not involved with participant enrollment. Participants were informed of their group assignment after consent and baseline measurements. Outcome assessors were blinded to group allocation.