Alzheimer's R&D: Tweaking Venture's Risk-Reward Ratio

Building Alzheimer's-focused companies remains difficult, in part because venture capital remains scarce. But advancese in diagnostic and imaging tools, improved means of measuring the impact of drugs on cognition, and a better understanding of therapeutic targets mean investment risks are improving, say some executives and VCs. Can Alzheimer's attract more mainstream VC investment and pay off with more lucrative deals like Pfizer's acquisition of Rinat?