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. 2015 Nov 6;94(44):e1965. doi: 10.1097/MD.0000000000001965

FIGURE 1.

FIGURE 1

A schematic illustration of participant selection in the present study. Among a total of 72,435 participants ages 12 to 18 years, individuals with incomplete survey data were excluded from the study. The data of the 53,769 participants from whom complete data were obtained were analyzed.