[1
]
Department of Gastroenterology, Royal Hallamshire Hospital, Sheffield, S10 2JF, UK.
matthew.kurien@sth.nhs.uk.
[2
]
Academic Unit of Gastroenterology, University of Sheffield, Sheffield, S10 2RX, UK.
matthew.kurien@sth.nhs.uk.
[3
]
Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, 17177,
Stockholm, Sweden.
[4
]
Department of Gastroenterology, Royal Hallamshire Hospital, Sheffield, S10 2JF, UK.
[5
]
Academic Unit of Gastroenterology, University of Sheffield, Sheffield, S10 2RX, UK.
[6
]
Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, 17177,
Stockholm, Sweden. jonasludvigsson@yahoo.com.
[7
]
Department of Pediatrics, Örebro University Hospital, Örebro University, Örebro, Sweden.
jonasludvigsson@yahoo.com.