function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bischoff, G. C. O.', 1],
    ['Cardoso, Cassiane Negreiros & Sanz-López, Javier', 1],
    ['Doweld, Alexander B.', 1],
    ['Hu, K. Y. & Qi, Y. P.', 3],
    ['Müller, K. J.', 1],
    ['Rasmussen, Jan Audun & Eriksson, Mats E. & Lindskog, Anders', 8],
    ['Sanz-López, Javier & Blanco-Ferrera, Silvia', 1],
    ['Y Y Zhen', 4],
    ['Zhen, Yong Yi', 39],
    ['Zhen, Yong Yi & Nicoll, Robert S.', 24],
    ['Zhen, Yong Yi & Percival, Ian G. & Webby, Barry D.', 46]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=129)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);