Parents flocked to a Hong Kong hospital yesterday to have their children tested for kidney problems only to be told the doctors were off on Sunday.
They were told to return to see doctors today.
The clinic was set up last week at Princess Margaret Hospital to handle patients who have consumed melamine-tainted milk products.
The absence of doctors drew widespread criticism, but a senior health official said there was no urgency for the check-ups.
News that a three-year-old girl in Hong Kong developed a kidney stone after drinking Yili milk daily for 15 months triggered jitters in the city. The girl, from Hung Hom, is the first known victim in Hong Kong of the tainted-milk scandal that has killed at least four babies and made about 52,000 others ill on the mainland.
Products made by at least 22 mainland dairy firms have been found contaminated with melamine - a chemical that causes kidney stones leading to renal failure in young children.