function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bouček, Zdeněk', 1],
    ['Burckhardt, Daniel & Yefremova, Zoya & Yegorenkova, Ekaterina', 5],
    ['Dale-Skey, Natalie & Askew, Richard R. & Noyes, John S.', 14],
    ['Om, Namgay & Yefremova, Zoya & Yegorenkova, Ekaterina', 1],
    ['Yefremova, Zoya & Gonzalez-Santarosa, Graciela', 2],
    ['Zuparko, Robert L. & Queiroz, Dalva Luiz De & Salle, John La', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);