Application of alkaline phosphatase-to-hemoglobin and lactate dehydrogenase-to-hemoglobin ratios as novel noninvasive indices for predicting severe acute pancreatitis in patients - Sha-Yan Chen; Xue-Jing Song; Jiong-Tang Lu; Jian-Xin Liang; Hao Ouyang; Wei-Hua Zheng; Jian-Jun Chen; Zheng-Gang Yin; Hui-Min Li; Yong Zhou (PLoS ONE)