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. 2018 Jul 6;28(4):475–478. doi: 10.1136/tobaccocontrol-2018-054494

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Example of novel PHWs placed on four spots of the waterpipe device: (A) glass body, (B) mouthpiece, (C) hose, (D) metal holder. Novel PHWs used in this study: (1) fetal harm, (2) blindness, (3) blood vessel clotting, (4) teeth and gum decay. PHW, pictorial health warning.