Afferent Pharmaceuticals (Palo Alto, CA) a clinical-stage biopharmaceutical company focused on pain associated with conditions such as osteoarthritis, back pain, visceral pain and neuropathy, closed a $23M Series A financing. Participants include Third Rock Ventures, Pappas Ventures, Domain Associates and New Leaf Venture Partners.

Note: 2009 Year-in-Review Trend Analysis Coming 15 Feb