Talvez deva tentar algumas variações de ortografia:
treg effective » are effective (Expandir a busca), drug effective (Expandir a busca), be effective (Expandir a busca)
decrease treg » decrease the (Expandir a busca), decrease their (Expandir a busca)
decrease toc » decrease of (Expandir a busca), decrease the (Expandir a busca), decreased to (Expandir a busca)
toc decrease » the decrease (Expandir a busca), not decrease (Expandir a busca), or decrease (Expandir a busca)
in decrease » in decreased (Expandir a busca), on decrease (Expandir a busca), pain decrease (Expandir a busca)
decrease to » decreased to (Expandir a busca), decrease the (Expandir a busca), decrease pro (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( decrease in decrease to decrease ) OR ( decrease toc decrease treg effective ))~.