One ringy dingy: call centers of the nineties.
Nussbaum
G M
GM
Hamilton HMC, USA.
Ault
S P
SP
D001071:Appointments and Schedules; D003258:Consumer Behavior; D003695:Delivery of Health Care / Q000639:trends; D006801:Humans; D007253:Information Centers / Q000639:trends*; D011369:Professional-Patient Relations; D013685:Telecommunications / Q000295:instrumentation / Q000639:trends*; D013689:Telephone / Q000639:trends; D014218:Triage / Q000639:trends*; D014481:United States