A method of administering insulin includes receiving blood glucose measurements of a patient at a data processing device from a glucometer. GOPs extend in coding order from a first key frame to a terminal frame that precedes another key frame in coding order. The laser source may comprise a plurality of lasers each providing a different color, such as red, green, and blue. The conveyor may transport the load carriers with a lower level of noise, and may allow a high throughput even of large loads.