Figure 3. Parameters of 2x4's A National Agenda for Research in Collaborative Care ParametersPossible Values for Each Parameter1. Length4'8'12'16'2. Grade#1#2#3C Select3. SpeciesFirPineMapleOakReturn to Document Current as of June 2011 Internet Citation: Figure 3. Parameters of 2x4's: A National Agenda for Research in Collaborative Care. June 2011. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/research/findings/final-reports/collaborativecare/collab3fig3.html