function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Akingbohungbe, A. E.', 3],
    ['Carpintero, Diego Leonardo & Dellapé, Pablo Matías', 1],
    ['Henry, Thomas J. & Carpintero, Diego L.', 9],
    ['Krüger, Andreas', 8],
    ['Puton, A.', 1],
    ['Yasunaga, Tomohide & Yamada, Kazutaka & Tsai, Jing-Fu', 3],
    ['Yeshwanth, H. M. & Chérot, F. & Henry, T. J.', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);