function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ahrens, Dirk', 13],
    ['Ahrens, Dirk & Bezděk, Aleš', 32],
    ['Ahrens, Dirk & Liu, Wan-Gang & Fabrizi, Silvia & Bai, Ming', 38],
    ['Ahrens, Dirk & Liu, Wangang & Fabrizi, Silvia & Bai, Ming', 25],
    ['Ahrens, Dirk & Lukic, Daniel', 1],
    ['Ahrens, Dirk & Pham, Phu Van', 14],
    ['Bezděk, Aleš & Hájek, Jiří & Ascr, Biology Centre', 3],
    ['Bhunia, Debika & Gupta, Devanshu & Chandra, Kailash', 2],
    ['Bhunia, Debika & Gupta, Devanshu & Sarkar, Subhankar Kumar', 1],
    ['Bohacz, Claudia & Ahrens, Dirk', 2],
    ['Chandra, Kailash & Ahrens, Dirk & Bhunia, Debika', 7],
    ['Liu, Wan-Gang & Bai, Ming & Yang, Xing-Ke & Ahrens, Dirk', 12],
    ['Liu, Wan-Gang & Fabrizi, Silvia & Bai, Ming & Ahrens, Dirk', 13],
    ['Liu, Wan-Gang & Fabrizi, Silvia & Bai, Ming & Yang, Xing-Ke', 24],
    ['Ranasinghe, Sasanka & Eberle, Jonas & Benjamin, Suresh P.', 2],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=193)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);