SNORA37 and gastric cancer: To explore the roles of SNORA37 in gastric cancer progression, MKN-45 and SNU-1 cells (with relatively moderate SNORA37 levels) were chosen as models for stable over-expression studies, while HGC-27 and AGS cell lines (with relatively high SNORA37 expression) were applied for stable knockdown experiments (Additional file 1: Fig. S2a).