according to https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4733321/, 2 weeks on dry ice seems to be equivalent to 3 seconds at room temperature (seems acceptable)
according to https://alcor.org/Library/html/HowColdIsColdEnough.html, 2 weeks on dry ice seems to be equivalent to 19.5 minutes at room temperature (seems unnecessarily risky)
according to https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4733321/, 2 weeks on dry ice seems to be equivalent to 3 seconds at room temperature (seems acceptable)
according to https://alcor.org/Library/html/HowColdIsColdEnough.html, 2 weeks on dry ice seems to be equivalent to 19.5 minutes at room temperature (seems unnecessarily risky)