NEW YORK (AP) — Jonas Kaufmann, the world's most sought-after tenor, hopes his cancellations are in the past. Back in the United States after a four-year absence caused mostly by illness but partly by a desire to spend more time with his children, the 48-year-old German with the clarion voice and heartthrob looks is giving recitals in California and New York this week and returns in April for performances in Boston and New York. "I'm very happy and thankful that I have so enthusiastic fans that they would love to see me every day perform," he explained during an interview this week.