Re: Letter to the Editor - Comment on: 'Sufficient levels of 25-hydroxyvitamin D and protein intake required to increase muscle mass in sarcopenic older adults - The PROVIDE study'
1 Department of Internal Medicine, Section of Gerontology and Geriatrics, Amsterdam University Medical Centers, Amsterdam, the Netherlands. Electronic address: g.verlaan@vumc.nl.
2 Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Amsterdam Movement Sciences, VU University, Amsterdam, the Netherlands; Department of Medicine and Aged Care, Royal Melbourne Hospital, University of Melbourne, Melbourne, Australia.
3 Department of Public Health and Caring Sciences/Clinical Nutrition and Metabolism, Department of Geriatric Medicine, Uppsala University Hospital, Sweden; Senior consultant, Theme Ageing, Karolinska University Hospital, Stockholm, Sweden.