source:[1] US FDA sends warning letters to Walmart, Target for selling recalled baby formula - Reuters (https://www.reuters.com/legal/litigation/us-f ...)[2] FDA sends warning letters to Walmart, Target for selling recalled baby formula - NBC News (https://www.nbcnews.com/health/recall/fda-war ...)[3] Big retailers didn't pull ByHeart baby formula fast enough after botulism recall, FDA says - Greenwich Time (https://www.greenwichtime.com/business/articl ...)