Effects of expressive art therapy on health status of patients with chronic obstructive pulmonary disease: a community-based cluster randomized controlled trial.

"Competing Interests: The authors declared no potential conflicts of interest with respect to the research, authorship and/or publication of this article."

"Funding: The authors received no financial support for the research, authorship and/or publication of this article."

"This study adhered to the Consolidated Standards of Reporting Trials (CONSORT) extension for cluster trials guidelines. This study was carried out according to the protocols approved by Xuzhou Centre for Disease Control and Prevention and approved by the Xuzhou Medical Science Ethics Committee (Approval No. 2012010). All participants provided written informed consent, underwent a pulmonary function test and completed all required information. The trial was registered with the Chinese Clinical Trials Registry (reference: ChiCTR-TRC-12001958) and conducted according to the 2000 revised version of the Helsinki Declaration. Ethics approval and consent to participate: This study was carried out according to the protocols approved by Xuzhou Center for Disease Control and Prevention and approved by the Xuzhou Medical Science Ethics Committee (approval number: 2012010). All participants provided written informed consent, underwent a pulmonary function test, and completed all required information. The trial was registered with the Chinese Clinical Trials Registry (reference: ChiCTR-TRC-12001958) and conducted according to the 2000 revised version of the Helsinki Declaration."