function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Yamani, F. & Nahhas, Fuad M.', 1],
    ['Bravo-Hollis, Margarita', 1],
    ['Johnson, William F. & Copsey, Jack E.', 1],
    ['Linton, E.', 1],
    ['Martin, W. E.', 1],
    ['Shen, J. - w. & Qiu, Zhaozhi', 1],
    ['Tang, C. - t. & Shi, Z. - m. & Hua, Cao & Guan, J. - z.', 2],
    ['Yamaguti, S.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=9)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);