Macro-level age norms for the timing of sexual initiation and adolescents' early sexual initiation in 17 European countries.
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C. Currie | A. Madkour | C. Halpern | E. Godeau | Tom Ter Bogt | V. Ehlinger | M. de Looze | T. Farhat | S. Nic Gabhainn | Ping Ma | Tom ter Bogt