function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anker, Arthur & Assayie, Aymere Awoke', 1],
    ['Anker, Arthur & Benzoni, Francesca', 2],
    ['Anker, Arthur & Grave, Sammy De', 1],
    ['Bruce, A. J.', 4],
    ['Clark, Paul F. & Ng, Peter K. L. & Fransen, Charles H. J. M.', 1],
    ['Fransen, Charles H. J. M.', 1],
    ['Fransen, Charles H. J. M. & Veer, Eva Van Der & Frolová, Pavlína', 2],
    ['Hayashi, Ken-Ichi', 1],
    ['Komai, Tomoyuki & Yamada, Yusuke', 2],
    ['Li, Xinzheng', 4],
    ['Li, Xinzheng & Bruce, Alexander J.', 8],
    ['Li, Xinzheng & Cleva, Régis & Poupin, Joseph', 3],
    ['Okuno, Junji', 1],
    ['Prakash, S. & Marimuthu, N.', 1],
    ['Wicksten, Mary K.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=33)',
    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);