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Chapter XI Diseases of oesophagus, stomach and duodenum - K20-K31 The following fourth-character subdivisions are for use with categories K25-K28: .0 Acute with haemorrhage .1 Acute with perforation .2 Acute with both haemorrhage and perforation .3 Acute without haemorrhage or perforation .4 Chronic or unspecified with haemorrhage .5 Chronic or unspecified with perforation .6 Chronic or unspecified with both haemorrhage and perforation .7 Chronic without haemorrhage or perforation .9 Unspecified as acute or chronic, without haemorrhage or perforation
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