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APA Citation
Sjogren, P. P., Gale, C., Henrichsen, J., Olsen, G., Ott, M. J., Peters, M., Srivastava, R., & Meier, J. D. (n.d.). variation in costs among surgeons and hospitals in Pediatric tympanostomy tube placement. Laryngoscope, 126, 1935–1939. http://access.bl.uk/ark:/81055/vdc_100034748605.0x00004c