function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barnett, Leonie J. & Miller, Terrence L. & Cribb, Thomas H.', 2],
    ['Chatterjee, Tapas & Dovgal, Igor & Fernandez-Leborans, Gregorio', 1],
    ['Durán-Ramírez, Carlos Alberto & Dias, Roberto Júnio Pedroso', 5],
    ['Esteban, G. F. & Finlay, B. J. & Olmo, J. L. & Tyler, P. A.', 2],
    ['Gürelli, Gözde', 2],
    ['Lu, Borong & Huang, Jie & Chen, Xiangrui', 5],
    ['Mayén-Estrada, Rosaura & Dias, Roberto Junio Pedroso', 7],
    ['Müller, Otto Friedrich', 4],
    ['Pinto, Hudson Alves & Melo, Alan Lane De', 1],
    ['Wilbert, Norbert & Song, Weibo', 1],
    ['Zhang, Xiumei & Ji, Daode & Zhang, Qianqian & Li, Chenghua', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    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);