function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Akrami, Mohammad Ali', 1],
    ['Aoki, Jun-Ichi', 2],
    ['Behan-Pelletier, Valerie M. & Lindo, Zoë', 3],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 2],
    ['Liu, Dong & Zhang, Zhi-Qiang', 1],
    ['Ma, Min & Li, Sheng-Cai & Fan, Qing-Hai', 1],
    ['Murvanidze, Maka & Mumladze, Levan', 1],
    ['Niedbala, Wojciech', 2],
    ['Niedbała, Wojciech', 10],
    ['Niedbała, Wojciech & Ermilov, Sergey G.', 3],
    ['Niedbała, Wojciech & Liu, Dong', 20],
    ['Niedbała, Wojciech & Starý, Josef', 5],
    ['Oliveira, Anibal R. & Argolo, Poliane S. & De, Gilberto J.', 3],
    ['Weigmann, G. & Miko, L.', 2],
    ['van der Hammen, L.', 6],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=63)',
    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);