function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bravo-Hollis, Margarita', 1],
    ['Hopkins, Sewell H.', 2],
    ['Knoff, M. & Amato, J. F. R', 1],
    ['Lebedev, B. I.', 1],
    ['Linton, E.', 2],
    ['Lopes, Daniela A. & Mainenti, Adriana & Knoff, Marcelo', 1],
    ['Manter, Harold W.', 2],
    ['Manter, Harold W. & Pritchard, M. H.', 1],
    ['Nagaty, H. F. & Abdel Aal, Tahia M.', 2],
    ['Nicoll, W.', 2],
    ['Shen, J. - w.', 1],
    ['Siddiqi, Ather H. & Cable, Raymond M.', 1],
    ['Thatcher, Vernon E.', 1],
    ['Wang, P. - q.', 1],
    ['Zhukov, E. V.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    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);