function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Allen, J. A.', 43],
    ['Hickman, Carole S.', 4],
    ['Ivanova, Mariya B. & Tsurpalo, Alexandra P.', 1],
    ['Mariottini, Paolo & Smriglio, Carlo & Oliverio, Marco', 2],
    ['Oliver, P. Graham & Holmes, Anna', 3],
    ['Oliver, P. Graham & Holmes, Anna & Killeen, Ian & Light, Janice', 3],
    ['Pacaud, Jean-Michel', 1],
    ['Petit, Richard E.', 1],
    ['Raines, Bret & Huber, Markus', 9],
    ['Suarez-Mozo, Nancy Yolimar & Gracia, Adriana', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=68)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);