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Kaplan‐Meier curve for calcium channel blocker monotherapy amongst 33 patients, subdivided into iNO responders (n = 10 at initiation) and oxygen responders (n = 23 at initiation). Dotted lines indicate mean duration of monotherapy for both cohorts. Restricted mean 10‐year duration of monotherapy for iNO Responders was 6.01 years and for oxygen responders was 2.76 years.
