function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Behne, L & Gaedike, H', 1],
    ['Dauber, D.', 39],
    ['Dauber, Diethard', 24],
    ['Giangrande, Adriana & Licciano, Margherita', 1],
    ['Gupta, Rajeev & Vitali, Francesco', 40],
    ['Li, Zhu & Chen, Li', 3],
    ['Li, Zhu & Tian, Li-Chao & Chen, Li', 1],
    ['Lin, Mei-Ying & Perissinotto, Renzo & Clennell, Lynette', 2],
    ['Pic, Maurice', 2],
    ['Tovar-Hernández, María Ana & Salazar-Silva, Patricia', 1],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=115)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);