Adults ages 18-89 with history of kidney stones needed for a study Individuals ages 18-89 years with a history of Calcium Oxalate kidney stones, are needed for a study exploring factors that impacting oxalate metabolism in kidney stone formers. The study involves consuming prepared meals over 4 days and collecting urine and blood. Compensation up to $140. For more information, call 205-934-5712 or email This email address is being protected from spambots. You need JavaScript enabled to view it. or This email address is being protected from spambots. You need JavaScript enabled to view it..