Schematic overview of study design.

<p>Following the start of the study period, 1^st January 2010, 4 theoretical qualifying events are shown. Within the 30 day follow up period, a re-attendance in hospital is observed for 1) an episode with oral treatment and 2) an episode with IV treatment. Each initial attendance enters into either the oral or IV group and a subsequent re-attendance may or may not occur during the 30 day follow-up period.</p

Baseline characteristics for patients at initial attendance.

<p>Baseline characteristics for patients at initial attendance.</p