Fig. 1From: Prescription frequency and patterns of Chinese herbal medicine for liver cancer patients in Taiwan: a cross-sectional analysis of the National Health Insurance Research DatabaseFlow diagram of study subjects selection from the National Health Insurance Research Database (NHIRD) during 2002-2009. Abbreviations: NHIRD: the National Health Insurance Research Database of Taiwan; HCC: Hepatocellular carcinoma; CHM: Chinese herbal medicineBack to article page