<qa>  What is the name of the treatment that repeats every 28 days?Patients receive oral perifosine daily on days 1-21. Treatment repeats every 28 days for up to 6 courses in the absence of disease progression or unacceptable toxicity. Patients who achieve a complete response CR or partial response PR receive 2 additional courses after documentation of CR or stable PR i.e., no further tumor shrinkage. 