function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alexander, C. P.', 8],
    ['Alexander, Charles Paul', 4],
    ['Byers, George W.', 2],
    ['Driauach, Ouafaa & Belqat, Boutaina', 2],
    ['Jarvis, Charlie', 2],
    ['Kolcsar, Levente-Peter & Oosterbroek, Pjotr', 13],
    ['Kolcsar, Levente-Peter & d\'Oliveira, Micha Camiel', 4],
    ['Lü, Hanhuiying & Chen, Yaru & Ren, Jinlong & Wang, Ning', 3],
    ['Obona, Jozef & Stary, Jaroslav & Manko, Peter & Hrivniak, Ľubos', 3],
    ['Podenas, Sigitas & Podeniene, Virginija', 16],
    ['Polevoi, Alexei & Ruokolainen, Anna & Shorohova, Ekaterina', 2],
    ['Ren, Jinlong & Yang, Ding', 8],
    ['Ribeiro, Guilherme C. & Santos, Daubian', 2],
    ['Starý, Jaroslav', 4],
    ['Ÿ, Jaroslav Star & Oosterbroek, Pjotr', 9],
    ['Other (7)', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=89)',
    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);