Expression and significance of IGF-2, PCNA, MMP-7, and α-actin in gastric carcinoma with Lauren classification - KUANG, Rong-Guang; WU, Heng-Xiang; HAO, Guo-Xiang; WANG, Jian-Wen; ZHOU, Cheng-Jun (Turkish Journal of Gastroenterology, 2013)