sentences:  Several countries have instituted patulin restrictions in apple products.The World Health Organization recommends a maximum concentration of 50 µg/L in apple juice.In the European Union, the limit is also set to 50 micrograms per kilogram (µg/kg) in both apple juice and cider, and to half of that concentration, 25 µg/kg, in solid apple products and 10 µg/kg in products for infants and young children.