2017 Yes https://doi.org/10.1017/S1368980017002312 Hecht, Amelie A. North America Experimental Observational Staff Elementary (K-5) Middle/Jr High (6-8) High School (9-12) Water quality Other Beverages Obesity Students Pediatrics Public policy Validated a school administrator survey by comparing responses with on-site observations and policy review. Found strong agreement for access items, less so for policy questions. Useful for large-scale surveillance.