function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ekins, Merrick & Erpenbeck, Dirk & Goudie, Lisa', 1],
    ['Ekins, Merrick & Erpenbeck, Dirk & Hooper, John N. A.', 4],
    ['Ekins, Merrick & Hooper, John N. A.', 3],
    ['Hestetun, Jon T. & Pomponi, Shirley A. & Rapp, Hans Tore', 2],
    ['Ise, Yuji & Vacelet, Jean', 2],
    ['Kelly, Michelle & Vacelet, Jean', 1],
    ['Ríos, Pilar & Cristobo, Javier', 2],
    ['Vacelet, Jean', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    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);