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Written informed consent regarding all study procedures was obtained from each participant before baseline and follow-up studies.","order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Compliance with ethical standards"}},{"value":"Grant support to MI, consulting fee to MT, and measurement of 25-hydroxyvitamin D were provided by Roche Diagnostics (Rotkreuz, Switzerland). The funding source did not play any role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; or preparation, review, or approval of the manuscript.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflicts of interest"}}]}}