Talvez deva tentar algumas variações de ortografia:
decreased risk » increased risk (Expandir a busca), decreased in (Expandir a busca)
hiv decreased » have decreased (Expandir a busca), is decreased (Expandir a busca), in decreased (Expandir a busca)
decrease that » decrease the (Expandir a busca), decrease at (Expandir a busca), decrees that (Expandir a busca)
that decrease » that increase (Expandir a busca), that increases (Expandir a busca), not decrease (Expandir a busca)
decrease hiv » decrease in (Expandir a busca), decrease their (Expandir a busca), decreased high (Expandir a busca)
risk process » risc processor (Expandir a busca), risco processo (Expandir a busca), work process (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( decrease hiv decreased risk process ) OR ( decrease _ decrease that decrease ))~.