Study	Reason for exclusion
Alves 2006	Study design not in the inclusion criteria: uncontrolled study.
Athanasopoulos 1999	Different outcome than described in inclusion criteria (parameters of pulmonary function).
Carman 1985	Patient in treatment group wore a brace.
Durmala 2002	Different outcome than described in inclusion criteria (ventilatory anaerobic threshold).
Durmala 2003	Study design not in the inclusion criteria: uncontrolled study.
Dyner‐Jama 2000	Different outcome than described in inclusion criteria (spirometric indexes).
Kowalski 2001	Study design not in the inclusion criteria: not reported if the study was prospective or retrospective.
Mamyama 2002	Study design not in the inclusion criteria: uncontrolled study.
Maruyama 2003	Study design not in the inclusion criteria: uncontrolled study.
McIntire 2008	Study design not in the inclusion criteria: uncontrolled study.
Mooney 2003	Study design not in the inclusion criteria: uncontrolled study.
Weiss 1991	Study design not in the inclusion criteria: uncontrolled study.
Weiss 1992	Study design not in the inclusion criteria: retrospective and uncontrolled study.
Weiss 1995a	Study design not in the inclusion criteria: uncontrolled study
Weiss 1997	Study design not in the inclusion criteria: uncontrolled study.
Weiss 2002	Use of passive corrective forces.
Weiss 2003a	Study design not in the inclusion criteria: results at follow‐up of two different uncontrolled prospective case series.
Weiss 2006a	Some patients in treatment group wore a brace.