Complex sentence: Interpersonal Psychotherapy (IPT) is a brief and highly structured manual based psychotherapy that addresses interpersonal issues in depression, to the exclusion of all other foci of clinical attention.
Split into simpler sentences: Interpersonal Psychotherapy (IPT) is a brief and highly structured psychotherapy conducted according to a written manual. It addresses interpersonal issues in depression, to the exclusion of all other foci of clinical attention.