<qa>  What is the duration of the treatment phase?The Expansion Cohort will be initiated at the RD. Depending on the RD, the lead in period will occur accordingly. After the lead in period, a period from Cycle 1 to the final administration will be performed as the Treatment Phase during which subjects will undergo a standardized evaluation for the safety and efficacy of rSIFN-co at the RD. If subjects are discontinued from the study treatment, discontinuation visit assessments should occur within 7 days of last rSIFN-co administration or confirmation of discontinuation criteria. End of treatment information will also be collected for all subjects who discontinue treatment after completion of cycle 1 treatment. Follow-up evaluations will be performed 28 days 5 days after the last rSIFN-co administration. 