Physical deviation and precocious puberty among school-aged children in Leshan City: an investigative study oleh Qiong Wei, Ming Wu, Yu-Lin Li, Rui Rao, Song Li, Qin Cen, Hua Wu, Li Lv, Mao Huang, Yu-Ping Ge, Zhi-Li Lu, Yao-Ping Wen, Ying Cao, Ting-Ting Liu, Li Wang