Correlations between survival and intravital microscopy parameters. (A) Blood flow rates correlated positively with survival. Most mice treated with IVIG had higher blood flow rates and survived longer than control mice (PBS; albumin). (B) Leukocyte rolling flux correlated positively with survival. (C) A negative correlation between the number of adherent leukocytes and survival was observed. (D) The number of interactions between RBCs and adherent WBCs correlated negatively with survival. *Spearman correlation for nonparametric values.