Cocoa tea (Camellia ptilophylla Chang), a natural decaffeinated species of tea – Recommendations on the proper way of preparation for consumption - Xiao-rong Yang; Yuan-yuan Wang; Kai-kai Li; Jing Li; Cheng-ren Li; Xiang-gang Shi; Chun-Hay Ko; Ping-chung Leung; Chuang-xing Ye; Xiao-hong Song (Journal of Functional Foods, 2011)