Switzerland's Adecco Group AG (ADEN.EB) said Tuesday that net profit for the first quarter fell due to one-offs and investments. Net profit for the three months ended March 31 was 130 million euros ($155.1 million) compared with EUR176 million the year previous. Revenue grew 4% on an organic basis to EUR5.69 billion, said the company. Adecco said revenue growth in March and April combined was between 5% and 6%, trading days adjusted. Adecco said it expects bank holiday phasing to be favorable in the second quarter, and the company's gross margin should be positively affected by 0.15% compared with the same period last year.via