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Calculus of 7mm had got chances of passing through urine using some herbal miracles products so i suggets you wait before surgery, There is some herbal Ayurvedic products working effectively on renal calculus.
inculding some other ayurvedic medicine work effectively
Contact your nearest ayurvedic doctor or write me firstname.lastname@example.org for details
Drink plenty of water and take those medicine rather than surgical procedure