Chronic disease comorbidity and associated factors among cancer patients in eastern Ethiopia oleh Abdi Birhanu, Michael Shawel Lemma, Biruk Habtamu, Nahom Wondwossen Worku, Monas Kitessa, Shambel Nigusie, Galana Mamo Ayana, Yehenaw Tenaw, Selamawit Sete, Bedasa Taye Merga, Ibsa Mussa