EXHIBIT 4.01 FIRST SUPPLEMENTAL INDENTURE FIRST SUPPLEMENTAL INDENTURE, dated as of February 14, 1997, by and among FHP International Corporation, a Delaware corporation (the "Company") having its principal office at 9900 Talbert Avenue, Fountain...Supplemental Indenture • May 15th, 1997 • Pacificare Health Systems Inc /De/ • Hospital & medical service plans • New York
