An estimated 10 million Americans suffer from osteoporosis, according to the National Institutes of Health. Another 34 million are considered at increased risk for getting the bone disease. A good many of those patients stand to benefit if a new osteoporosis drug from Amgen (NasdaqNM:AMGN - News) turns out to be successful. Phase two data on the investigational drug, dubbed Denosumab, was recently published in the New England Journal of Medicine. The drug was given in twice-yearly injections. A total of 412 postmenopausal women with low bone marrow density were randomly assigned to receive Denosumab, Merck's (NYSE:MRK - News) Fosamax...