A comparative study of laparoscopic neoplasty and open neoplasty on levels of procalcitonin and cell-mediated immunity in elderly patients with upper digestive tract ulcer perforation

WANG Gengzhuang1, ZHAO Zhirong2, PAN Lifeng1

Tianjin Medical Journal . 2016, (6): 772 -775 . DOI: 10.11958/20150273