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van der Stelt PF, Ruttimann UE, Webber RL.van der Stelt PF, et al. Among authors: webber rl.Dentomaxillofac Radiol. 1989 Aug;18(3):113-7. doi: 10.1259/dmfr.18.3.2700350.Dentomaxillofac Radiol. 1989.PMID: 2700350