Kaiser Permanente is teaming up with Target Corp. to run medical clinics at four retail stores in Southern California, including one in Fullerton, the health care giant said Wednesday. The Fullerton clinic, at the Target location on Malvern Avenue, will open Saturday. The other three clinics – in Vista, San Diego and Fontana – opened Nov. 17. The four clinics are part of a network of 79 clinics run by Target in seven states. They are also part of a larger trend, in which medical care is increasingly being moved out of traditional settings such as doctors offices and hospital emergency rooms and integrated into retail spaces like chain pharmacies, grocery stores and big box stores.