1. Center for Cancer and Cell Biology, Laboratory for Structural Biology and Biochemistry; Van Andel Research Institute; Grand Rapids MI USA
2. Center for Cancer and Cell Biology, Laboratory of Structural Sciences; Van Andel Research Institute; Grand Rapids MI USA
3. Van Andel Research Institute/Shanghai Institute of Materia Medica Center, Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica; Chinese Academy of Sciences; Shanghai China