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Payne, J B; Johnson, G K; Reinhardt, R A et al. (1998) Histological alterations following short-term smokeless tobacco exposure in humans. J Periodontal Res 33:274-9
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Ringdahl, B E; Johnson, G K; Ali, R B et al. (1997) Effect of nicotine on arachidonic acid metabolites and epithelial parameters in rat oral mucosa. J Oral Pathol Med 26:40-5
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Johnson, G K; Organ, C C (1997) Prostaglandin E2 and interleukin-1 concentrations in nicotine-exposed oral keratinocyte cultures. J Periodontal Res 32:447-54
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Payne, J B; Johnson, G K; Reinhardt, R A et al. (1996) Nicotine effects on PGE2 and IL-1 beta release by LPS-treated human monocytes. J Periodontal Res 31:99-104
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Johnson, G K; Poore, T K; Payne, J B et al. (1996) Effect of smokeless tobacco extract on human gingival keratinocyte levels of prostaglandin E2 and interleukin-1. J Periodontol 67:116-24
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Poore, T K; Johnson, G K; Reinhardt, R A et al. (1995) The effects of smokeless tobacco on clinical parameters of inflammation and gingival crevicular fluid prostaglandin E2, interleukin-1 alpha, and interleukin-1 beta. J Periodontol 66:177-83
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Johnson, G K; Poore, T K; Squier, C A et al. (1994) Prostaglandin E2 and interleukin-1 levels in smokeless tobacco-induced oral mucosal lesions. J Periodontal Res 29:430-8
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Chen, Y P; Johnson, G K; Squier, C A (1994) Effects of nicotine and tobacco-specific nitrosamines on hamster cheek pouch and gastric mucosa. J Oral Pathol Med 23:251-5
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Johnson, G K; Squier, C A (1993) Smokeless tobacco use by youth: a health concern. Pediatr Dent 15:169-74
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