function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Corkum, Kenneth C.', 2],
    ['Fischthal, Jacob H. & Thomas, J. D.', 1],
    ['Gaevskaya, A. V. & Aleshkina, L. D.', 1],
    ['Hopkins, Sewell H.', 2],
    ['Hopkins, Sewell H. & Sparks, Albert K.', 1],
    ['Manter, Harold W.', 1],
    ['Riggin, G. T. & Sparks, Albert K.', 1],
    ['Sogandares-Bernal, F.', 1],
    ['Velasquez, Carmen C.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=11)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);