function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barahona-Segovia, Rodrigo M. & Guzmán, Vicente Valdés', 1],
    ['Brunetti, E. A.', 2],
    ['El-Hawagry, Magdi S. & Abdel-Dayem, Mahmoud S.', 1],
    ['Gerstaecker, C. E. A.', 1],
    ['Gillung, Jéssica Paula & Carvalho, Claudio José Barros De', 1],
    ['González, Christian R. & Elgueta, Mario & Ramirez, Francisco', 1],
    ['Hudson, George Vernon', 1],
    ['Kehlmaier, Christian & Almeida, Jorge Mota', 6],
    ['Kehlmaier, Christian & Gharali, Babak & Jahromi, Bahareh Majnon', 1],
    ['Meigen, Johann Wilhelm', 1],
    ['Nartshuk, E. P. & Bagachanova, A. K.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    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);