fundoplication laparoscopic fundoplication neurologic impairment open fundoplication surgical outcomes adolescent article child controlled study data base female health care cost human infant intermethod comparison laparoscopic surgery length of stay major clinical study male newborn pediatric health information system postoperative complication postoperative infection preschool child priority journal retrospective study school child stomach fundoplication treatment outcome united states adolescent child child; preschool databases; factual female follow-up studies fundoplication health care surveys hospitals; pediatric humans laparoscopy laparotomy length of stay male multivariate analysis pain measurement postoperative complications regression analysis statistics; nonparametric surgical wound infection treatment outcome united states