function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Azarkina, Galina N. & Logunov, Dmitri V.', 3],
    ['Norma-Rashid, Y. & Li, Daiqin', 2],
    ['Peng, Xianjin & Li, Shuqiang', 1],
    ['Wesolowska, Wanda & Haddad, Charles R.', 1],
    ['Wesołowska, Wanda & Russell-Smith, Anthony', 1],
    ['Xu, Xin & Peng, Xianjin & Li, Daiqin', 6],
    ['Zhang, J. X. & Li, Daiqin', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);