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Lawrence-Snyder M, Scaffidi J, Angel SM, Michel AP, Chave AD.Lawrence-Snyder M, et al. Among authors: angel sm.Appl Spectrosc. 2006 Jul;60(7):786-90. doi: 10.1366/000370206777887161.Appl Spectrosc. 2006.PMID: 16854267
Vann BC, Angel SM, Hendrix JE, Bartick EG, Morgan SL.Vann BC, et al. Among authors: angel sm.Appl Spectrosc. 2009 Apr;63(4):407-11. doi: 10.1366/000370209787944389.Appl Spectrosc. 2009.PMID: 19366506