function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bilqees, Fatima Mujib & Nighat, Yasmin', 1],
    ['Cable, Raymond M.', 1],
    ['Gu, Chang-dong & Shen, J. - w.', 1],
    ['Gupta, A. N.', 5],
    ['Layman, E. M.', 1],
    ['Liu, Sheng-fa', 3],
    ['Manter, Harold W.', 1],
    ['Manter, Harold W. & Crowcroft, Peter W.', 1],
    ['Nicoll, W.', 2],
    ['Ozaki, Yoshimasa', 3],
    ['Parukhin, A M', 1],
    ['Shen, J. - w.', 2],
    ['Shen, J. - w. & Qiu, Zhaozhi', 1],
    ['Shen, J. - w. & Tong, Yong-yong', 1],
    ['Yamaguti, S.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    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);