Quest Diagnostics Inc. (DGX) is likely to grow in the coming quarters, backed by strength in the legacy base business. The company is gaining from collaborations with health plans, hospitals and physicians amid a broad return to care. However, a high debt level on the balance sheet and intense competition also raise concerns.In the past year, this Zacks Rank #3 (Hold) stock has declined 8.9% against the industry’s 9% growth and a 24.5% rise of the S&P 500 composite.The renowned provider of diagnostic inform ...