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van Leerdam ME, van der Ende A, ten Kate FJ, Rauws EA, Tytgat GN.van Leerdam ME, et al. Among authors: tytgat gn.Am J Gastroenterol. 2003 Apr;98(4):798-801. doi: 10.1111/j.1572-0241.2003.07387.x.Am J Gastroenterol. 2003.PMID: 12738458