This document discusses a cross-sectional study that focused on 10-12 year old children suffering from fluorosis in an area without fluoridated drinking water. It notes that in a cross-sectional study, the characteristic shared by all samples at the time of study is the point of intersection. It also acknowledges forgetting the journal title but providing the key points, and references an analogy of "lontong" previously described by Prof. Bur to help explain the topic clearly.