The microbiological quality of water in fish spas with Garra rufa fish, the Netherlands, October to November 2012 Schets, F M and van den Berg, H H and de Zwaan, R and van Soolingen, D and de Roda Husman, A M, Eurosurveillance, 20, 21124 (2015), https://doi.org/10.2807/1560-7917.ES2015.20.19.21124