Please see attached document. 

What are the study objectives?                                                                     

State the exposure/intervention of interest                                                  

The authors stated, Eligible patients were randomly assigned to 7 days of cephalexin or clindamycin; primary and secondary outcomes were clinical improvement at 48 to 72 hours and resolution at 7 days. Explain what the term random assignment or randomization means  

What is the population under study?

Outline the inclusion/exclusion criteria and the initial sample size in each group.

Briefly describe the data collection procedures, statistical tests, and any instruments used.

Specify the baseline variables.