Two Master's-level biostatisticians, Colleen Azen, M.S., and Ling Zheng, M.S., provide daily on-site coverage for study design, statistical power analysis and methods for collecting and analyzing data.  For projects requiring special expertise, such us statistical genetics, additional consulting services are available through an arrangement with the USC Division of Biometry.  Other services include guidance in statistical methods, selection and use of statistical software, and interpretation and presentation of results.