Fig. 1From: An integrated multi-study analysis of intra-subject variability in cerebrospinal fluid amyloid-β concentrations collected by lumbar puncture and indwelling lumbar catheterProfile of percent change of the mean in Aβ42 for each subject studied by each sponsor with serial sampling of CSF for up to 40 hours post catheter placement. Percent change of the mean is on the y axis and time of day for each study sponsor is shown on the x axis. a AbbVie Inc., b Bristol-Myers Squibb (BMS), c Eli Lilly and Company, d Merck and Company, e Radboud University Medical Center (RUMC), f Washington UniversityBack to article page