PT - JOURNAL ARTICLE AU - Campbell, Michelle Renee AU - Shokrani, Masih TI - Introduction, Background and Various Types AID - 10.29074/ascls.29.2.106 DP - 2016 Apr 01 TA - American Society for Clinical Laboratory Science PG - 106--110 VI - 29 IP - 2 4099 - http://hwmaint.clsjournal.ascls.org/content/29/2/106.short 4100 - http://hwmaint.clsjournal.ascls.org/content/29/2/106.full SO - Clin Lab Sci2016 Apr 01; 29