Can the stock still deliver the same kinds of returns it has over the past few decades?Johnson & Johnson (JNJ 1.53%) is one of the world's largest healthcare companies by market capitalization. The drugmaker has diversified operations, generating consistent revenue and profits.However, Johnson & Johnson has lagged the market in recent years due to a combination of factors, leading some investors to question whether it's still a solid long-term pick. Looking at some critical company-specific developments may ...