Prevalence of comorbidities and their impact on survival among older adults with the five most common cancers in Taiwan: a population study oleh Li-Hsin Chien, Tzu-Jui Tseng, Tzu-Yu Chen, Chung-Hsing Chen, Chia-Yu Chen, Hsin-Fang Jiang, Fang-Yu Tsai, Hsiu-Ying Ku, Shih Sheng Jiang, Chao A. Hsiung, Tsang-Wu Liu, I-Shou Chang