1. Pretreatment age and serum lactate dehydrogenase as predictors of synchronous second primary cancer in patients with nasopharyngeal carcinoma
   Chien-Fu Yeh et al, 2020, Oral Oncology CrossRef
2. Simultaneous resection of an adenocarcinoma of the cardia and a synchronous adenocarcinoma of the sigmoid: Report of a case
   Giulio Illuminati et al, 2018, Annals of Medicine and Surgery CrossRef