Statistics from Altmetric.com
Ambulances have featured occasionally on the world's postage stamps usually as part of the design of a war charity or Red Cross/Crescent stamp. On some occasions other specific ambulance organisations have been the theme—an example being the four stamps from Great Britain in 1987 to commemorate the centenary of the St John Ambulance Brigade. The modern stamp from Uruguay in 1997 was issued to mark the 18th anniversary of United Coronary Mobile stated as the first mobile medical emergency unit in the world. This is the only stamp ever issued relating to mobile coronary care. The stamp is relatively unusual being a peelable self-adhesive stamp—although self-adhesives are becoming more frequently issued nowadays.