Figure 3From: The basics of preclinical drug development for neurodegenerative disease indicationsCash flow 'Valley of Death' diagram. The cash flow 'Valley of Death' as a function of development stage (time) with typical funding sources at various stages (adapted from [12]). RAID, Rapid Access to Interventional Development; SBIR, Small Business Innovative Research; RAPID, Rapid Access to Preventive Intervention Development; STTR, Small Business Technology Transfer.Back to article page