Worried Hong Kong parents who bought Friso, a popular powdered infant formula brand, are taking their children for medical check-ups and are seeking replacements after a batch of the product was found to contain excessive levels of lead.One mother told the South China Morning Post on Tuesday that her five-month-old baby was staying in hospital for observation after the child consumed the same batch of Frisolac Prestige Stage 1 (800 grams) flagged by Macau authorities.The affected batch,...