Pupil-led sex education in England (RIPPLE study): cluster-randomised intervention trial
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Anne M Johnson | A. Oakley | A. Copas | V. Strange | A. Babiker | J. Stephenson | S. Forrest | A. Johnson | H. Monteiro | J. Stephenson | S. Black | E. Allen | E. Allen | M. Ali | A. Johnson | A. Babiker