Participants will receive medical follow-up according to the schedule of the oncology units. Besides, participants will receive an amount of time and attention that mimic that received by the experimental group, but which is thought not to have any specific effect on the outcome measures. They will be invited to attend leisure activities organized by a community centre in four different days during the study period. Activities include cartoon film shows, handicraft workshops, chess games, health talks on the prevention of influenza and healthy diet, day visit to museums and theme parks and galleries.