function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Burks, B. D.', 1],
    ['Hansson, Christer & Aebi, Alexandre & Benrey, Betty', 5],
    ['Hansson, Christer & Kenyon, Sarah G. & Benrey, Betty', 9],
    ['Hansson, Christer & Lachaud, Jean-Paul & Perez-Lachaud, Gabriela', 2],
    ['Hansson, Christer & Padua, Diego G. & Schoeninger, Karine', 1],
    ['Pikart, Tiago G. & Costa, Valmir A. & Hansson, Christer', 6],
    ['Pérez-Benavides, A. Lucía & Hernández-Baz, Fernando', 10],
    ['Schauff, M. E.', 1],
    ['Yefremova, Zoya A.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=36)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);