function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ackland, D. M.', 24],
    ['Bächli, Gerhard & Merz, Bernhard & Haenni, Jean-Paul', 1],
    ['Du, Jing & Xue, Wanqi', 6],
    ['El-Hawagry, Magdi S. & Abdel-Dayem, Mahmoud S.', 2],
    ['El-Hawagry, Magdi S. & Sharaf, Mostafa R. & Al Dhafer, Hathal M.', 1],
    ['Evenhuis, Neal L. & O’Hara, James E. & Pape, Thomas', 1],
    ['Gomes, Lucas R. P. & Couri, Márcia S.', 2],
    ['Gomes, Lucas Roberto Pereira', 2],
    ['Gomes, Roberto Pereira & Fogaça, João Manuel', 1],
    ['Grisales, Diana & Lopes, André César', 3],
    ['Michelsen, Verner', 15],
    ['Schlüsslmayr, Gerhard', 4],
    ['Suwa, Masaaki', 1],
    ['Telfer, Angela C & Young, Monica R & Quinn, Jenna & Perez, Kate', 1],
    ['ZHANG, XUFENG & ZHU, WEIBING', 18]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=82)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);