Tony Williams is Newfoundland and Labrador Health Services' senior director of supply chain management. (Mark Cumby/CBC)Newfoundland and Labrador Health Services says everything it buys is under the microscope as it looks for alternatives to U.S. products, but adds it can't come at the cost of affecting patients.Tony Williams, the senior director of supply chain for NLHS, says thousands of items are housed inside the health authority's new 85,000-sq. ft warehouse in St. John's — which he says se