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Graphical representation of study aims. Study aims are divided into 3 parts: cross-sectional aims and short- and long-term prospective aims. Arrows represent (Ia–IIIa) main effects (direct associations in the case of the cross-sectional aims) and (Ib–IIIb) moderating effects (differential associations in the case of cross-sectional aims) with “+” and “−” signs indicating the expected direction of each association.
