TY - JOUR T1 - Study Design and Statistical Analysis: A Practical Guide for Clinicians. JF - Respiratory Care SP - 490 LP - 491 VL - 52 IS - 4 AU - Thomas A Lang Y1 - 2007/04/01 UR - http://rc.rcjournal.com/content/52/4/490.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -