function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baycelebi, Esra', 5],
    ['Bleeker, Pieter', 6],
    ['Băcescu, Mihai', 2],
    ['Chen, Yongxia & Chen, Hao & He, Dekui & Chen, Yifeng', 2],
    ['De Filippi, F.', 2],
    ['Eagderi, Soheil & Mouludi-Saleh, Atta & Esmaeili, Hamid Reza', 4],
    ['Freyhof, Jörg & Bayçelebi, Esra & Geiger, Matthias', 30],
    ['Hamilton, F. Buchanan', 7],
    ['Linnaeus, Carolus', 5],
    ['McClelland, J.', 13],
    ['Nakajima, Jun', 12],
    ['Nurettin Meriç & Lütfiye Eryilmaz & Müfit Özulug', 5],
    ['Saad, Adib & Çiçek, Erdoğan & Esmaeili, Hamid Reza', 4],
    ['Sayyadzadeh, Golnaz & Esmaeili, Hamid Reza', 4],
    ['Sykes, W. H.', 3],
    ['Other (48)', 55]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=159)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);