Theranos Inc. is closing its lab in Scottsdale and its wellness centers in the metro Phoenix area. The Palo Alto, California-based company employs 340 people in Arizona, California and Pennsylvania. In June, more than 200 of them were in Arizona. Instead, the company will focus on its miniLab platform, according to a letter on the company's website from founder Elizabeth Holmes. "Our ultimate goal is to commercialize miniaturized, automated laboratories capable of small-volume sample testing,…