[1] Fourth Mil Med Univ, Fac Basic Med, Dept Anat, Xian 710032, Peoples R China
[2] Fourth Mil Med Univ, Fac Basic Med, KK Leung Brain Res Ctr, Xian 710032, Peoples R China
[3] Fourth Mil Med Univ, Sch Stomatol, Dept Paediat Dent, Xian 710032, Peoples R China