Samajwadi Party founder and former Uttar Pradesh chief Mulayam Singh Yadav have been admitted to a hospital here for some abdominal health issues, sources said on Sunday. The 80-year-old leader, who is also former Defence minister, came to a private hospital here three days back on the advice of doctors, they said.Samajwadi Party founder and former Uttar Pradesh chief Mulayam Singh Yadav have been admitted to a hospital here for some abdominal health issues, sources said on Sunday. The 80-year-old leader, who is also former Defence minister, came to a private hospital here three days back on the advice of doctors, they said.