Accentuates successful disposition program and underscores strength of new platform Portfolio sales increase to $458 per square foot, increasing over 20% since 2012 PHILADELPHIA, 2016-Apr-02 — /EPR Retail News/ — PREIT (NYSE: PEI) today announced it has completed the sale of four additional non-core malls, a milestone achievement that signifies the near-completion of the Company's non-core…