TY - JOUR AU - Pandolfino, J E; Kwiatek, M A; Nealis, T TI - Achalasia: a new clinically relevant classification by high-resolution manometry JO - Gastroenterology VL - 135 PY - 2008 DO - 10.1053/j.gastro.2008.07.022 SP - 1526 EP - 1533 N1 - et al. ER -