The name of the fourth author was spelled incorrectly. The correct name is: Patrice M. Ambühl.
The correct citation is: Tomonaga Y, Risch L, Szucs TD, Ambühl PM (2013) The Prevalence of Chronic Kidney Disease in a Primary Care Setting: A Swiss Cross-Sectional Study. PLoS ONE 8(7): e67848. doi:10.1371/journal.pone.0067848.