1003
Four patients in whom pulmonary oedema developed during tocolysis with hexoprenaline are described and the aetiological factors and pathogenesis of this potentially lethal complication discussed.
 adverse event: developed 
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: adverse event, potential therapeutic event 
Text: {0} 
Answer:
 adverse event: developed 