Survival analysis of older adults with dementia: predicting factors after unplanned hospitalization in Maharaj Nakorn Chiang Mai Hospital oleh Thanachat Yotruangsri, Phichayut Phinyo, Nida Buawangpong, Nopakoon Nantsupawat, Chaisiri Angkurawaranon, Kanokporn Pinyopornpanish