RT @CarlvKeirsbilck: Screening, NOG zo'n belangrijke voorwaarde vlgns Harvard onderzk om scholen veilig te kunnen opstarten waar NIET aan v…
RT @CarlvKeirsbilck: Screening, another important condition vlgns Harvard onderzk for schools to start up safely where NOT to v ...
Harry Spoelstra MD PhD CardioVascular Surgeon, Visiting Prof, special interests: Universe/Our Galaxy, Nature/Weather, Stratosphere/PolarVortex, Covid19
Harry Spoelstra MD PhD Cardiovascular Surgeon, Visiting Professor, special interests: Universe / Our Galaxy, Nature / Weather, Stratosphere / Polar Vortex, Covid19