SEATTLE (AP) — Apple Inc. co-founder and Chief Executive Steve Jobs said Wednesday he is taking a medical leave until June, even though just a week ago the cancer survivor tried to assure investors and employees his recent weight loss was caused by an easily treatable hormone deficiency. Apple’s stock dropped nearly 7 percent. Jobs, 53, said in a letter last week that he would remain at Apple’s helm despite the hormone problem, and that he had already begun a “relatively simple and straightforward” treatment. But in an e-mail to employees Wednesday, Jobs backtracked. “During the past week I have learned that my health-related issues are more complex than I originally thought,” he wrote.