“…In 1,435 reoperations (31.3%), the indication for reoperation was not reported. Preoperative symptoms were assessed by questionnaire in 26 studies (32.1%) 10,14,17,18,23–25,28,30,33,36,45,53,54,56,61–66,71,74,76,87,88. In most studies (93.8%), preoperative workup consisted of esophagogastroduodenoscopy, barium swallow, and/or esophageal pH monitoring 10–28,30–41,43–46,48–76,78,79,81–89…”