Talvez deva tentar algumas variações de ortografia:
cardiovascular reactions » cardiovascular actions (Expandir a Pesquisa), cardiovascular functions (Expandir a Pesquisa), cardiovascular medications (Expandir a Pesquisa)
ortiz cardiovascular » aortic cardiovascular (Expandir a Pesquisa), mortem cardiovascular (Expandir a Pesquisa), port cardiovascular (Expandir a Pesquisa)
reactions pediatric » section pediatric (Expandir a Pesquisa), reasons pediatric (Expandir a Pesquisa), reduction pediatric (Expandir a Pesquisa)
pediatric age » pediatric acute (Expandir a Pesquisa)
german ortiz » guzman ortiz (Expandir a Pesquisa), duran ortiz (Expandir a Pesquisa), carmen ortiz (Expandir a Pesquisa)
age leads » care leads (Expandir a Pesquisa), case leads (Expandir a Pesquisa), age les (Expandir a Pesquisa)
annu » ann (Expandir a Pesquisa), anna (Expandir a Pesquisa), anne (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Performing a fuzzy search may retrieve terms with similar spellings: german ortiz cardiovascular reactions pediatric age leads annu~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: german ortiz cardiovascular reactions pediatric age leads annu*.