GAMBIA has not yet confirmed that toxic cough syrup was the cause of the deaths of 70 children from acute kidney injury, a representative of the country's Medicines Control Agency said. The small West African state has been investigating a mysterious slew of child deaths in recent months, which police said in a preliminary investigation was linked to four cough syrups made in India. World Health Organization (WHO) investigators have found "unacceptable" levels of diethylene glycol and ethylene glycol in the products, which were made by New Delhi-based Maiden Pharmaceuticals Ltd. But Gambia's Medicines Control Agency, a national regulatory body, has not yet pinpointed…