National;
Laboratory;
of;
Medical;
Neurobiology,Fudan;
University;
Medical;
Center,;
138;
Yi;
Xue;
Yuan;
Road,Shanghai;
200032,;
People's;
Republic;
of;
China;
Institute;
of;
Biochemistry;
and;
Cell;
Biology,Shanghai;
Institutes;
for;
Biological;
Sciences,Chinese;
Academy;
of;
Sciences,;
320;
Yue;
Yang;
Road,Shanghai;
20031,;
People's;
Republic;
of;
China;
Present;
address:;
Behavioral;
Neuroscience;
Branch;
IRP/NIDA/NIH,5500;
Nathan;
Shock;
Drive,;
Baltimore,;
MD;
21224,;
USA;