This film is fairly tightly divided into 3 sections. These are interlinked but in the end it feels a bit too much of a formula.
The first section is excellent, the narrative and the cinematography combining to magnificent effect. It is so good, in fact, that the second section comes as something of an unwelcome deflation. A whole new group of characters is introduced and much of the impetus is lost.
By the end of this second section the momentum and the interest has been successfully built up again, but then we are pitched into an over-detailed study of the medical processes that unite the two strands of the story.
Ultimately it is a moving tale with some fine acting and excellent photography, but it could have been better with a less clunky structure.