O intervention
cancer, Cancer
CANCER, CANCER
The intervention group received laughter yoga for four sessions with one-week intervals. Each session lasts for 20–30 min and it consists of 15 steps of laughter yoga performed consecutively. And each laugh lasts approximately 30 to 45 s. This intervention was provided by researchers who had completed laughter yoga training course from the laughter yoga instructor and participants were supervised during each session. Laughter yoga sessions were held in three groups of 8, 12, and 14 cancer patients. The intervention was carried out before the chemotherapy according to the protocol. The four sessions of the intervention were performed in a standing position following the 15 steps (Supplementary Material In the control group, only routine self-care training was conducted by the researchers in the meeting hall in the form of face-to-face education and the use of pamphlets. This program was implemented exactly the same for the intervention group with 10 min one session each week for four weeks. The educational content was developed after reviewing the related literature, up-to-date studies, guidelines of the National Cancer Prevention and Control Program published by the Ministry of Health and Medical Education (MHME), World Health Organization [