function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alberto T. Barrion & Aimee Lynn A. Barrion-Dupo', 1],
    ['Cao, Qi & Li, Shuqiang & Żabka, Marek', 3],
    ['Huang, Yi & Wang, Cheng & Peng, Xian-Jin', 5],
    ['Kanesharatnam, Nilani & P. Benjamin, Suresh', 4],
    ['Luong, Phung Thi Hong & Yamasaki, Takeshi & Eguchi, Katsuyuki', 1],
    ['Magar, Kiran Thapa & Shrestha, Bimal Raj & Gurung, Tek Bahadur', 1],
    ['Peng, Xianjin & Li, Shuqiang', 4],
    ['Sudhin, Puthoor Pattammal & Caleb, John T. D. & Sen, Souvik', 6],
    ['Trilikauskas, L. A.', 1],
    ['Wanda Wesołowska', 1],
    ['Wang, Cheng & Li, Shuqiang', 3],
    ['Wang, Cheng & Mi, Xiao-Qi & Wang, Wei-Hang & Gan, Jia-Hui', 13],
    ['Wesolowska, Wanda & Haddad, Charles R.', 1],
    ['Wesołowska, Wanda & Russell-Smith, Anthony', 7],
    ['Żabka, Marek', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=53)',
    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);