1. State Key Laboratory of Bioactive Substance and Function of Natural MedicinesBeijing City Key Laboratory of Drug Delivery Technology and Novel FormulationsInstitute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical College Beijing 100050 China
2. Department of Medical OncologyNational Cancer Center/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical College Beijing 100021 China