function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alkusairy, Hasan & Saad, Adib', 2],
    ['Bariche, Michel & Fricke, Ronald', 1],
    ['Bañon, Rafael & Arronte, Juan Carlos', 1],
    ['Biscoito, Manuel & Ribeiro, Cláudia & Freitas, Mafalda', 1],
    ['Carneiro, Miguel & Martins, Rogélia & Landi, Monica', 2],
    ['Cervigón, Fernando', 1],
    ['Ebert, David A. & Wintner, Sabine P. & Kyne, Peter M.', 2],
    ['Elasmobranch, Its Implications For Global', 1],
    ['Frade, F.', 1],
    ['Golani, Daniel', 1],
    ['Laan, Richard Van Der & Eschmeyer, William N. & Fricke, Ronald', 1],
    ['Lipej, Lovrenc & Dulčić, Jakov', 1],
    ['Nurettin Meriç & Lütfiye Eryilmaz & Müfit Özulug', 1],
    ['Yano, Kazunari & Murofushi, M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);