Apollo Hospitals is on an aggressive mode. Barely a month after buying out US-based BPO firm Zavata for Rs 700 crore, Pratap Reddy's Apollo Hospitals is now gearing up for big ticket expansions back home.Apollo will spend Rs 650-700 crore to set up three new hospitals in Mumbai. The first hospital will come up at Navi-Mumbai for which it will invest around Rs 250 crore. T