This included five (28%) patients who met the BM and peripheral blood morphologic criteria for CR (n=4) or PR (n=1) and 3 patients with clinical improvement, pending validation of response duration and resolution of drug-induced grade-1 thrombocytopenia. The four (22%) CR patients experienced reversal of BM fibrosis and recovery of normal megakaryocyte morphology.
My take here (agreeing with jq1234) is that the bolded text is clearly a shorthand reference to the previous sentence and does not imply these were complete CRs. The fact that the sentence then goes on to discuss only BM fibrosis and morphology reinforces that reading.