Place chicken bones in a large stainless steel pot with water, vinegar and all vegetables except parsley. Let stand for 30 minutes to one hour Bring to a boil. Reduce heat, cover and simmer for 8 - 12 hours. The longer you cook the stock, the richer and more flavorful it will be and the more minerals you extract (chicken bones will completely dissolve in about 72 hours of cooking with additional vinegar). About 10 minutes before finishing the stock, add parsley. This will impart additional mineral ions to the broth.