function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dale-Skey, Natalie & Askew, Richard R. & Noyes, John S.', 30],
    ['Hopper, Keith R. & Woolley, James B. & Hoelmer, Kim', 4],
    ['Howard, L. O.', 1],
    ['Japoshvili, G. & Abrantes, I.', 8],
    ['Japoshvili, George & Hansen, Lars Ove', 9],
    ['Lopes, Thomas & Libert, Pierre-Nicolas & Starý, Petr', 7],
    ['Martínez-Chávez, Laura Marcela & Duque-Gamboa, Diana Nataly', 2],
    ['Rust, E. W.', 1],
    ['Shirley, Xanthe A. & Woolley, James B. & Hopper, Keith R.', 4],
    ['Swezey, O. H.', 1],
    ['Timberlake, P. H.', 2],
    ['Walker, Francis', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=78)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);