You will be given a definition of a task first, then some input of the task.
Given an abstract, generate a keyword (a noun phrase) that best describes the focus or contribution of the paper. Such keywords can be directly from the given abstract or outside it.

Abstract: Plasma fibronectin levels were determined in 34 children admitted with severe infectious purpura. Fibronectin concentration was decreased in severe infectious purpura as in other sepsis, but there was no significant difference between shock and nonshock patients. Fibronectin levels were lower in children with ecchymotic or necrotic purpura on admission than in those with petechial purpura; they were lower in those who developed cutaneous sequelae, but it is not known if correction of fibronectin deficiency may limit the extent of purpura and prevent the cutaneous sequelae.
Output:
Child