function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Breure, Abraham S. H. & Tardy, Emmanuel', 3],
    ['Echeverría, María L. & Alonso, Sara I. & Comparatore, Viviana M.', 1],
    ['Fryxell, Paul A.', 1],
    ['Grings, Martin & Boldrini, Ilsi Iob', 2],
    ['Jarvis, Charlie', 5],
    ['Ramella, Lorenzo & Perret, Patrick', 2],
    ['Verloove, Filip', 1],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);