According to the text, it is correct to affirm that

silicone manufacturers were unable to keep tabs on implanted patients, which has hindered tests.

medical journals have been warning doctors against the dangerous practice of breast augmentation.

silicone implant manufacturers have absolutely no data on female patients after they get their first surgery.

by selling a faulty product, manufacturers and surgeons alike have a guaranteed source of income.

despite their ultimate efforts to compile data, health authorities have been deceived by silicone implant manufacturers.