function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arce-Pérez, Roberto & Novelo-Gutiérrez, Rodolfo', 2],
    ['Arce-Pérez, Roberto & Novelo-Gutiérrez, Rodolfo & Cornejo, Aydeé', 1],
    ['Arce-Pérez, Roberto & Shepard, William D. & Morón, Miguel A.', 3],
    ['Barr, Cheryl B. & Shepard, William D.', 1],
    ['Bouchard, Patrice & Bousquet, Yves & Davies, Anthony E.', 1],
    ['Hubbard, Todd', 1],
    ['Hájek, Jiří', 6],
    ['Kiesenwetter, E. A. H. von', 3],
    ['Lee, Chi-Feng & Yang, Ping-Shih', 3],
    ['Lee, Chi-Feng Dr. & Lawrence, John F. & Satô, Masataka Dr.', 1],
    ['Lewis, George', 5],
    ['Novelo-Gutiérrez, Rodolfo', 3],
    ['Shepard, William D. & Barr, Cheryl B.', 7],
    ['Shepard, William D. & Sites, Robert W.', 20],
    ['Webster, Reginald P. & DeMerchant, Ian', 2],
    ['Other (4)', 4]
  ]);
  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);