There has been data ("Sample Size Calculations for Clustered and Longitudinal Outcomes in Clinical Research (Chapman & Hall/CRC Biostatistics Series) - ISBN-13 978-1-4665-5627-0") available for this ISBN from the data sources that books-by-isbn.com uses, but not on the latest request on Sun Feb 2 14:25:44 2020, so the data displayed here has been removed .