HONG KONG, Sept. 21 (Xinhua) -- A three-and-a-half-year-old girl living in Hong Kong who has been drinking Yili milk daily for the past 15 months has developed a kidney stone, the Center for Health Protection of Hong Kong reports on Sunday.

    The Hospital Authority contacted the Center after her parents took her to clinic for a medical checkup on Friday. The girl had had two to three six-ounce cups of the brand high-calcium, low-fat milk daily.

    After the Yili brand product had been contaminated with melamine, a chemical that can cause kidney stones leading to kidney failure among young children, the girl's parents were concerned and took her to Tseung Kwan O Clinic for a checkup.

    Medics at the clinic found the stone in her left kidney and made arrangements for her to receive treatment at Princess Margaret Hospital on Saturday. She was treated there and discharged.

    The Center has sent letters to all medical practitioners reminding them to report cases of renal disease among children if they are suspected to be related to the consumption of melamine adulterated milk products.

    The Center reminds people not to drink milk nor consume milk products that were found to contain melamine.