Regeneron Pharmaceuticals and Avalanche Biotechnologies have entered a collaboration to discover, develop and commercialize gene therapy products for ophthalmologic diseases. The collaboration covers gene therapy vectors and molecules discovered jointly by Avalanche and Regeneron, developed using the Avalanche Ocular BioFactory, an adeno-associated virus (AAV)-based next-generation platform.   Avalanche will receive an upfront payment and is eligible to receive as much as $640 million in develop...