Juul Labs Inc is halting sales in Indonesia, citing concerns that it can’t stop retailers from selling its high-nicotine e-cigarettes to young people in a largely unregulated tobacco market. Juul said in a statement that it would suspend Indonesia sales “indefinitely” until it could ensure that online and traditional retailers there will “increase and enforce age restrictions and compliance measures.” The firm’s decision to retreat from the world’s fourth most populous nation - which has not been previously reported - marks a major setback for Juul’s larger plans to expand in Asia. [...]