Case Based Learning

Hi -
I teach a case-based class in Biostatistics at a small liberal arts college and am looking for good (or bad!) examples of primary literature papers that use statistics. I prefer them to be short (less than 4 pages) and focused mostly on one type of test at a time. Currently I'm looking for papers that use: Chi-square, ANOVA, GLMs with and without interactions and Design of Experiments.
Any suggestions? Papers that use these statistical tests well or that use them poorly are both welcome! Any area of biology from medicine to ecology is fine.